There is no moral obligation in a situation with a lack of choice. However, the VAST majority of people are not in situations where animal products must be eaten to survive.
But are you in that situation now? Do you need to eat animals to survive? If not, why do you do it?
We are called to walk the Royal Path, and for those in the workaday world, that includes eating meat sometimes, and not eating meat sometimes. Regardless of what we are eating, however, we offer prayers of gratitude and thanksgiving and sorrow for living by the death of other living things.
If I were an Orthodox Christian monk, I would follow the restrictions I listed above all the time because those foods are known to enflame the passions, but are more necessary when one is working for a living and raising a family. I would spend much more time in prayer than my current schedule allows, however, but that is not my path at this time.
If I'm interpreting this correctly, you're saying you eat meat for 2 reasons. The first is that not doing so would make you too prideful, and the second is because it's in the "Royal Path", which we are called to.
I think the pigs, sheep, chickens, etc. would prefer you feel a little prideful, compared to what happens to them when you eat to them [1]. As for the "Royal Path" can you elaborate? Why does the Royal Path condone violence against non-humans?
It seems unfair to me that sentient animals need to die in your very personal battle with pride. Do you not see that as unfair?
Also, are you prideful when you abstain from eating baboon? Or when you abstain from eating hippopotamus, or giant squid? Why is it that pridefulness comes from abstaining from pig and chicken, but not any other animals you already don't eat?
I don't think this will make sense to you, and I understand why it wouldn't, but I trust the traditions of my faith, and the teachings of the Church Fathers in my tradition, more than I trust my own judgement.
The "higher path" in Orthodoxy is the monastic life, which includes not eating meat, dairy, eggs, (and only rarely eating olive oil and wine), but I am not a monk. And the "lower path" in Orthodoxy is to live in the world and to fast from those things for more days during the year than not. I follow the liturgical calendar, and I follow the teachings of my faith because I trust the accumulated wisdom of my faith more than I trust my own judgement, because I lack discernment and spiritual maturity. May God have mercy on us all. Please forgive me for not having a clearer or more satisfying answer for you.
That said I think it's important to remember that eating meat is not about you or me, it's about the animals we are (not) eating. The animal doesn't care about our reasons. If you imprisoned a cat and some days you tortured it and some days you left it alone, the cat would not care why. It could not even understand why and causing it pain for one's own spiritual growth seems, respectfully, prideful to me. There is no ethical middle path between sometimes torturing a cat and sometimes not. Probably if you told your priest about an imprisoned cat you were sometimes torturing he would tell you to release it immediately.
I'm sorry that I compared what you feel to be a religious necessity to eat meat to torturing a cat. That was disrespectful. Discussions on eating meat should be less all-or-nothing. For example there is a tremendous amount of food wasted in the U.S., including animal products: https://www.vox.com/future-perfect/22890292/food-waste-meat-.... Reducing food waste is something I think everyone can support.
I also agree that the "all or nothing" kind of tone that many people who advocate against eating meat takes is a hard line to sell. A "try a plant-based meal once a week" would be a much easier sell.